Scientist say that earthquakes are the deadly side of geography . They strike unexpectedly . They are very dangerous. Here is how they start . During an earthquake a pulse of compression is sent out, which squeezes rock . When the pulse reaches Earth's surfaces tit refracts and reduces stress on the rock . The earth relieves pressure on the growing quake allowing the rock on either side of the fault to slide more freely. During an earthquake, land and roads might get disconnected and trees and electricty poles might fall . Fires may start from open gas tanks and the electricity wires on the ground.

On January 24, 1556 in Shaanix Province, China the deadliest earthquake in history occured, killing 830,000 people . On December 16,1811 in the Mississippi Valley near New Madrid,Missouri the quake reversed the course of the Mississippi River.

In conclusion, earthquakes can be very deadly. They are little quakes and big quakes but both can be dangerous and people should take precautions.

Below is from a newspaper from 1886. It shows an earthquake which split buildings and streets.This is a sketch of what the street looked like after the earthquake.